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    blastula

    blastula - 365bet中国官方网站 definition and meaning for word blastula

    Definition
    (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
    Synonyms : blastosphere
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